I find the word "concern" attractive, because it is not as often seen as other words. Is it always safe to use it instead of "firm" or "business" -- even if the business is a small startup? For example, is the following correct?
DanSoft is a small one-man concern in Chicago. It is operated by one Daniel X., a long-time software enthusiast.
For similar reasons, I'm also attracted to the word "operate", and putting "one" in front of the name.
What do you think? Are these three words "concern", "operate", and "one" appropriate here? Would native English speakers find them inappropriate? Maybe a little archaic? Too formal? Or just fine?